Police are appealing for witnesses to a crash near Handy Cross roundabout in High Wycombe.
The two-car crash happened on Marlow Hill at around 1pm on Saturday, October 26.
One driver then allegedly got out of their car and assaulted the other.
Thames Valley Police has asked any witnesses to the incident or anyone with dash-cam footage that could help the investigation to get in touch.
Information can be reported by calling 101 and quoting reference 43240517307.
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